EP0305994A3 - Data communication system having means for switching between main and stand-by apparatuses - Google Patents

Data communication system having means for switching between main and stand-by apparatuses Download PDF

Info

Publication number
EP0305994A3
EP0305994A3 EP19880114194 EP88114194A EP0305994A3 EP 0305994 A3 EP0305994 A3 EP 0305994A3 EP 19880114194 EP19880114194 EP 19880114194 EP 88114194 A EP88114194 A EP 88114194A EP 0305994 A3 EP0305994 A3 EP 0305994A3
Authority
EP
European Patent Office
Prior art keywords
apparatuses
stand
switching
main
communication system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19880114194
Other versions
EP0305994A2 (en
EP0305994B1 (en
Inventor
Masaaki Iwasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of EP0305994A2 publication Critical patent/EP0305994A2/en
Publication of EP0305994A3 publication Critical patent/EP0305994A3/en
Application granted granted Critical
Publication of EP0305994B1 publication Critical patent/EP0305994B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus
EP88114194A 1987-08-31 1988-08-31 Data communication system having means for switching between main and stand-by apparatuses Expired - Lifetime EP0305994B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP215094/87 1987-08-31
JP62215094A JPS6460026A (en) 1987-08-31 1987-08-31 Transmission line switching device for communication equipment

Publications (3)

Publication Number Publication Date
EP0305994A2 EP0305994A2 (en) 1989-03-08
EP0305994A3 true EP0305994A3 (en) 1990-09-05
EP0305994B1 EP0305994B1 (en) 1994-06-01

Family

ID=16666654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114194A Expired - Lifetime EP0305994B1 (en) 1987-08-31 1988-08-31 Data communication system having means for switching between main and stand-by apparatuses

Country Status (5)

Country Link
US (1) US4831617A (en)
EP (1) EP0305994B1 (en)
JP (1) JPS6460026A (en)
CA (1) CA1325045C (en)
DE (1) DE3889814T2 (en)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5175639A (en) * 1986-11-21 1992-12-29 Hitachi, Ltd. Optical subscriber network transmission system
JPH0752886B2 (en) * 1987-12-19 1995-06-05 富士通株式会社 How to configure a loop network
US5193086A (en) * 1988-08-26 1993-03-09 Hitachi, Ltd. Network system having a line switching function
US4964105A (en) * 1988-11-01 1990-10-16 Dsc Communications Corporation Replacement switch
JPH0624366B2 (en) * 1988-11-24 1994-03-30 日本電気株式会社 Network failure recovery method
US5313456A (en) * 1989-03-03 1994-05-17 Fujitsu Limited Data link protecting system
JPH02231603A (en) * 1989-03-06 1990-09-13 Toshiba Corp Duplex switch system
DE3929793A1 (en) * 1989-09-07 1991-03-21 Siemens Ag Automatic switching system for parallel duplex communication channels - monitors signals received from each channel at each communication device
US5016244A (en) * 1989-09-08 1991-05-14 Honeywell Inc. Method for controlling failover between redundant network interface modules
US4964120A (en) * 1989-09-08 1990-10-16 Honeywell Inc. Method of detecting a cable fault and switching to a redundant cable in a universal local area network
JPH04286242A (en) * 1991-03-15 1992-10-12 Fujitsu Ltd Device and method for hit-free switching
US5307340A (en) * 1991-04-02 1994-04-26 The Furukawa Electric Co., Ltd. Multipath transmission system with a troubleshooting arrangement for detecting failure
DE4123008C2 (en) * 1991-07-11 2001-11-15 Siemens Ag Cordless phone system
JP3181963B2 (en) * 1992-02-17 2001-07-03 富士通株式会社 Transmission terminal equipment
CA2125692C (en) * 1992-10-13 2004-06-22 Kazuo Iwatate Optical line switching system
DE4306032C2 (en) * 1993-02-26 1997-03-06 Siemens Ag Circuit arrangement for the redundant structure in communication systems
US5408462A (en) * 1993-10-07 1995-04-18 Adc Telecommunications, Inc. Protection switching apparatus and method
JP3434556B2 (en) * 1994-01-10 2003-08-11 富士通株式会社 Signal line switching circuit
DE19506216A1 (en) * 1995-02-22 1996-08-29 Deutsche Telekom Ag Method and arrangement for optimal use of the transmission capacity in synchronous bidirectional ring networks
KR0164140B1 (en) * 1995-06-29 1999-01-15 김주용 Error recovery apparatus and method of a head-end watching environment block in an optic cable tv
JPH0955761A (en) * 1995-08-11 1997-02-25 Toshiba Corp Multiple-network connection device
DE19537103A1 (en) * 1995-10-05 1997-04-10 Bosch Gmbh Robert Redundant fiber optic network
KR19980020514A (en) * 1996-09-09 1998-06-25 김광호 Implementing Fault Tolerance of Private Switching System of Integrated Telecommunication Network
CA2303635A1 (en) * 2000-03-31 2001-09-30 Allan Isfan Fail to pots architecture
US6874041B1 (en) * 2000-06-07 2005-03-29 Conexant Systems, Inc. Automatic configuration of communication device input or output terminal
JP2006279355A (en) * 2005-03-28 2006-10-12 Nec Corp Wavelength division multiplex transmission system, wavelength division multiplex transmission device, and method of controlling the same
CN101777934B (en) * 2009-12-30 2012-11-21 三一重工股份有限公司 Radio link standby system
US8682158B2 (en) * 2011-08-24 2014-03-25 Ciena Corporation Systems and methods for detecting line flapping in optical networks
JP2016035610A (en) * 2014-08-01 2016-03-17 日本電気株式会社 Information processing system, information processing apparatus, redundancy method, and program

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0142138A2 (en) * 1983-11-11 1985-05-22 Fujitsu Limited Protection switching system for carrier transmission line
US4680750A (en) * 1984-10-01 1987-07-14 Lynch Communication Systems, Inc. Universal high-speed span line switch

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3457373A (en) * 1965-09-22 1969-07-22 Posterijen Telegrafie En Telef Automatic channel switching device for multi-channel binary code telecommunication system
JPS5837743B2 (en) * 1979-12-13 1983-08-18 富士通株式会社 Automatic transmission line switching method
US4412323A (en) * 1980-06-03 1983-10-25 Rockwell International Corporation Muldem with improved monitoring and control system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0142138A2 (en) * 1983-11-11 1985-05-22 Fujitsu Limited Protection switching system for carrier transmission line
US4680750A (en) * 1984-10-01 1987-07-14 Lynch Communication Systems, Inc. Universal high-speed span line switch

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IEEE International Conference on Communications 1974, Minneapolis, US, 17-19 June 1974 Conference Record, IEEE, New York, US, 1974 Pages 8D-1 to 8D-5, M. Frame et al.: "LD-4 Digital Repeatered Line" *
PATENT ABSTRACTS OF JAPAN vol. 5, no. 153 (E-76)(825) 26 September 1981, & JP-A-56 84052 (FUJITSU K.K.) *

Also Published As

Publication number Publication date
EP0305994A2 (en) 1989-03-08
US4831617A (en) 1989-05-16
DE3889814D1 (en) 1994-07-07
DE3889814T2 (en) 1994-10-20
EP0305994B1 (en) 1994-06-01
JPS6460026A (en) 1989-03-07
CA1325045C (en) 1993-12-07

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